In the binomial expansion of (a-b) ^n, n≥5, the sum of 5th and 6th term is 0. Find a/b.

In the binomial expansion of (a-b) ^n, n≥5, the sum of 5th and 6th t

1.	In the binomial expansion of (a-b) ^n, n≥5, the sum of 5th and 6th term is 0. Find a/b.
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